Let’s get you unstuck.

No image bytes are uploaded by the optimizer. The codecs run in your browser. The website still requests its page assets, codecs, and fonts; see the Privacy page for details.

Format compatibility can cost bytes. An explicit conversion is delivered even when larger, with an amber size badge. If format and dimensions stay the same, the original is kept whenever it is smaller.

Savings depend on image content and your selected mode. Smart PNG checks adaptive color reduction. Balanced is more conservative, and Lossless may save little on an already compact image. Your original is kept when no smaller same-format, same-dimension result is found. Try WebP or AVIF if the destination accepts a different format.

Static PNG, JPEG, WebP, and AVIF are supported. GIF, SVG, HEIC, JPEG XL, and animated files are not supported in this version.

Each batch accepts up to 30 images, 10 MB per file, and 24 million decoded pixels per image. Download and clear the batch before adding more.

A file may be empty, too large, corrupt, animated, unsupported, or over the pixel limit. The result or notice explains the reason. The original file on your device is untouched.

Use an individual download button or Download ZIP. Your browser chooses the download destination. Results are not kept between page visits.

Yes, in browsers that support folder selection. The downloaded ZIP keeps relative folder paths. Duplicate output filenames are given a suffix rather than overwriting another result.

PNG has its own compression mode. Smart PNG checks adaptive color reduction, Balanced makes conservative changes, Lossless preserves decoded pixels, and Smaller PNG uses up to 256 colors. Manual JPEG, WebP and AVIF settings use the quality slider instead.

You can set an optional target. For lossy output, PikoZip searches lower quality when necessary. It reports Target not reached if the goal is still out of reach; try a smaller maximum width or another format.

Processing uses your device. Large images and AVIF can take longer. Try a smaller batch, set a maximum width, or choose a fixed JPEG/WebP output instead of Smart mode.

Clear all stops the current worker and removes this page’s batch. Files already downloaded remain in your browser’s download folder.